Html code is the foundation of a websites and their pages. Properly structured pages act as hubs that display graphics and text to online visitors.
Document Type Declaration are published list from W3C that declare latest versions of web browsers and validate structure for web pages in a best website design process. Latest web browsers use DTD to determine how a web page should be rendered. These are considered as best practices in ecommerce web design and all optimized websites.
After this validate the code sing online tools or the validation code checker built in your HTML editor in order to check compliance to W3C specification.
Website owners should prepare uvalidation reports that point our line by line where your coding reports error and is not W3C compliant. A new web designer should use a validator to find out the latest HTML specifications and make perfect pages.
A web page without DOCTYPE tag or an improper tag that does not conform to DTD standards will fail to load or will be rendered as gibberish.
Declaring a DTD on your web pages is the first step in creating a standard compliant website.Test you pages in all popular web browsers and fix rendering problems as an efficient web designer.